MD_DataIdentification

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Title

Abstract

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International Geomagnetic Reference Field - 11th Generation

The eleventh generation of the International Geomagnetic Reference Field (IGRF) was
adopted in December 2009 by the International Association of Geomagnetism and Aeronomy
Working Group V-MOD. It updates the previous IGRF generation with a definitive main
field model for epoch 2005.0, a main field model for epoch 2010.0, and a linear predictive
secular variation meodel for 2010.0-2015.0.

Processing steps were carried out collectively by the developers of the model. The
description of the evaluation and weighting process can be found in C.C. Finlay et
al "Evaluation of IGRF-11 Candidate Models" in the Journal of Earth, Planets and Space.

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Processing steps were carried out individually by the developers of the model.

While every effort has been made to ensure that these data are accurate and reliable
within the limits of the current state of the art, NOAA cannot assume liability for
any damages caused by any errors or omissions in the data, nor as a result of the
failure of the data to function on a particular system. NOAA makes no warranty, expressed
or implied, nor does the fact of distribution constitute such a warranty.

Seven teams from the IAGA V-MOD group created independent candidate models for the
IGRF-11. The models used the same datasets from satellites and land observatories
with different criteria, filters, and processing steps. The various candidate models
and their descriptions can be found at http://www.ngdc.noaa.gov/IAGA/vmod/candidatemodels.html

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The seven models were tested, evaluated, and compared by C.C. Finlay et al. The final
model was calculated using weighted means of the candidates. The weights were agreed
by a vote of the IGRF-11 task force.